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优化验证码效果

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This commit is contained in:
whvcse@foxmail.com
2018-08-09 15:50:40 +08:00
parent 7defc7e727
commit 27af06eff5
9 changed files with 139 additions and 85 deletions
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22
src/main/java/com/wf/captcha/ChineseCaptcha.java
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@@ -58,7 +58,6 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
g.fillRect(0, 0, width, height);
// 抗锯齿
g.setColor(color());
g.setFont(font);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
int hp = (height - font.getSize()) >> 1;
int h = height - hp;
@@ -69,8 +68,8 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
// 计算坐标
int x = i * w + sp + num(-5, 5);
int y = h + num(-5, 5);
if (x < 0) {
x = 0;
if (x < 5) {
x = 5;
}
if (x + font.getSize() > width) {
x = width - font.getSize();
@@ -81,21 +80,16 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
if (y - font.getSize() < 0) {
y = font.getSize();
}
g.setFont(font.deriveFont(num(2) == 0 ? Font.PLAIN : Font.ITALIC));
g.drawString(String.valueOf(strs[i]), x, y);
}
// 随机画干扰线
g.setStroke(new BasicStroke(1.25f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
for (int i = 0; i < 6; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f); // 指定透明度
g.setComposite(ac3);
int x1 = num(-10, width - 10);
int y1 = num(5, height - 5);
int x2 = num(10, width + 10);
int y2 = num(2, height - 2);
g.drawLine(x1, y1, x2, y2);
// 画干扰圆圈
g.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
}
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f); // 指定透明度
g.setComposite(ac3);
drawLine(2, g.getColor(), g);
// 画干扰圆圈
drawOval(5, g.getColor(), g);
ImageIO.write(bi, "png", out);
out.flush();
ok = true;